brown



(No Model.)

O. W. BROWN.

TELEPHONE SUPPORT. No. 404,680. Patented June 4, 1889.

Wi/Cwaoocq gwvem-toi N. PUERS, PhoioLilhogrn izher. Waah'lnginn. D. C.

UNITED STATES PATENT OFFICE.

CHARLES WV. BROWN, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO THE BELL TELEPHONE COMPANY OF CANADA, OF SAME PLACE.

-TELEPHONE-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 404,680, dated June 4, 1889.

Application filed March 31, 1888. Renewed February 25, 1889. Serial No. 301,135. (No model.) Patented in Canada May 29,

To all whom it may concern:

Be it known that I, CHARLES WARREN BROWN, of the city of Montreal, in the District of Montreal and Province of Quebec, Canada,

have inventedcertainnew and useful Improvements in the Adjustable Supporting of Telephone-Transmitters; (for which Letters Pat ent of the Dominion of Canada No. 29,234 have been granted May 29, 1888;) and I do 10 hereby declare that the following is a full,

clear, and exact description of the same.

This invention relates to the means for supporting what are known as batterytransmitters (viz., those consisting of a fixed r 5 horizontal diaphragm upon which the current-varying mediums-such as fineIy-di vided carbon part-icles rest) in such a manner that the transmitter can be raised or lowered to suit the varying heights of different speakers without tilting it to one side or the other, or,

in other words, withoutchanging the direction or angle of the diaphragm or other part of the transmitter relatively to any fixed plane.

2 5 It consists in ahorizontal extension formed on the usual casting (in the cup-shaped upper section of which the transmitter is placed) and having a vertical sleeve at its end to encircle and slide up and down and be set at any desired height by means of a set-screw or other means on a vertical rod carried in bearings projecting from the usual cast-metal box (in which the induction-coil is situated and the usual screw-posts for making the necessary connect-ions placed) secured to the wall, or the bearings may project from any other suitable base. For full comprehension, however, of the invention reference must be had to the annexed drawings, in which Figure 1 is a side view of a transmittersupported according to my invention; Fig. 2, a front view with trumpet-shaped mouth-piece removed, and Fig. 3 a horizontal cross-section of vertical rod, &c.

Similar letters of reference indicate like parts.

A is the metal casting, with the upper section T cup-shaped, as usual, to receive the transmitter mechanism proper, the front section A forming the passage or tube leading to the diaphragm and terminating in a socket, as usual, for the mouth-piece M.

A is the horizontal extension which I add to theoasting, projecting from the opposite or back side of it and terminating in a vertical sleeve S.

B is the usual cast-m etal box, secured to the Wall and carrying the requisite number of screw-posts b, the induction-coil also being placed within it.

B B are bearin gs projecting from the front of box Bto support the vertical rod R,which, by preference, has a groove 0" cut in one side of it, in which the end of the set-screw S, working through sleeve S, fits, as shown in Fig. 3, and secures movement up or down in a straight line.

The loosening of the screw S of course allows the transmitter to be adjusted to any point desired, and the tightening of it of course fixes it there, and it will be seen that it is impossible for the diaphragm or other part of the transmitter to change its angle in any way.

hat I claim is as follows:

A telephone-transmitter carried in a cup formed on a castingto which the mouth-piece is attached, said casting having an extension terminating in a sleeve sliding on a vertical rod secured to box containing induction-coil, or to any other suitable base, and means for securing sleeve at desired height, as set forth.

C. WV. BROWN.

Witn esses:

FRAs. HY, REYNOLDS, WM. P. McFEAT. 

